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Fluid Mechanics and Machinery MCQs: 238 Questions & Answers in Engineering

238 Fluid Mechanics and Machinery MCQs in Engineering with answers & explanations. Practice objective questions for competitive exams, interviews & self-asse… Use the answer toggle below to show or hide all solutions, tap an option to check one question, or open a question for its own page.

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Fluid Mechanics and Machinery MCQs: 238 Questions & Answers in Engineering

The Reynolds number is found out for a flow in a circular pipe. This circular pipe is moulded into a square pipe, keeping length of the pipe same. Ignore the thickness of the pipe. The Reynolds number changes by

The flow through a circular pipe is laminar. Now, the fluid through the pipe is replaced with a more viscous fluid and passed through the pipe again with the same velocity. What can we say about the nature of this flow?

What can be the maximum diameter of the pipe for the water flow of velocity 1 m/s (ν = 10-6) to be laminar in nature? Assume Lower critical Reynolds number to be 2100.

Which of the following flows have the highest critical Reynolds number (lower)?

The flow separation occurs when the fluid travels away from the

The swirl caused due to eddies are called as

Eddy viscosity is a turbulent transfer of

Which among the following is a device that converts a laminar flow into a turbulent flow?

Boundary layer separation does not undergo detachment.

With the boundary layer separation, displacement thickness

automatic control scheme during the fluid flow?

What is D’Alembert’s Paradox?

The steady- state flow must satisfy

depend on the friction factor?

How do we calculate losses for a larger range of Reynolds number?

Which among the following is formula for friction factor of circular pipes?

Darcy- Weisbach equation gives relation between

Loss of head due to friction is

The formula for hydraulic diameter is

What are the reasons for minor head loses in a pipe?

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